The Vampire Diaries Stefan (Paul Wesley) tries to protect Caroline’s (Candice King) twins from the Siren on a new episode of the supernatural drama. 8 p.m. KTLA
Crazy Ex-Girlfriend Rebecca (Rachel Bloom) plans a gals-only get-together on a new episode of the kooky musical comedy; Donna Lynne Champlin and Gabrielle Ruiz also star. 9 p.m. KTLA
Shark Tank California entrepreneurs pitch an electric-skateboard business in this new installment. 9 p.m. ABC
Z Nation Warren (Kellita Smith) leads an attack to try to capture Murphytown’s leader (Keith...